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Titolo:
Synthesis and optical properties of a novel organic/inorganic hybrid nonlinear optical polymer via sol-gel process
Autore:
Xi, HX; Li, Z; Liang, ZX;
Indirizzi:
S China Univ, Inst Chem Engn, Canton 510640, Peoples R China S China UnivCanton Peoples R China 510640 anton 510640, Peoples R China Zhongshan Univ, Inst Polymer Sci, Canton 510275, Peoples R China ZhongshanUniv Canton Peoples R China 510275 ton 510275, Peoples R China
Titolo Testata:
CHINESE JOURNAL OF POLYMER SCIENCE
fascicolo: 4, volume: 19, anno: 2001,
pagine: 421 - 427
SICI:
0256-7679(200107)19:4<421:SAOPOA>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Keywords:
sol-gel process; nonlinear optical material; alkoxysilane dye; dipole alignment relaxation; chromophore;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Xi, HX S China Univ, Inst Chem Engn, Canton 510640, Peoples R China S China Univ Canton Peoples R China 510640 10640, Peoples R China
Citazione:
H.X. Xi et al., "Synthesis and optical properties of a novel organic/inorganic hybrid nonlinear optical polymer via sol-gel process", CHIN J POLY, 19(4), 2001, pp. 421-427

Abstract

A new organic/inorganic hybrid nonlinear optical (NLO) material was developed by the sol-gel process of an alkoxysilane dye with tetraethoxysilane. ANLO moiety based on 4-nitro-4 ' -hydroxy azobenzene was covalently bonded to the triethoxysilane derivative, i.e, gamma -isocyanatopropyl triethoxysilane. The preparation process and properties of the sol-gel derived NLO polymer were studied and characterized by SEM, FTIR,H-1-NMR, UV-Vis, DSC and second harmonic generation (SHG) measurement. The results indicated that thechemical bonding of the chromophores to the inorganic SiO2 networks induces low dipole alignment relaxation and preferable orientational stability. The SHG measurements also showed that the bonded polymer film containing 75 wt% of the akoxysilane dye has a high electro-optic coefficient (r(33)) of 7.1 pm/V at 1.1 mum wavelength, and exhibit good SHG stability, the r(33) values can maintain about 92.7% of its initial value at room temperature for90 days, and can maintain about 59.3% at 100 degreesC for 300 min.

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Documento generato il 09/07/20 alle ore 16:47:09